Thermodynamical Properties of Spin-3/2 Ising Model in a Longitudinal Random Field with Crystal Field

A theoretical study of a spin-3/2 Ising model in a longitudinal random field with crystal field is studiedby using of the effective-field theory with correlations. The phase diagrams and the behavior of the tricritical point areinvestigated numerically for the honeycomb lattice when the randorm field is bimodal. In particular, the specific heatand the internal energy are examined in detail for the system with a crystal-field constant in the critical region wherethe ground-state configuration may change from the spin-3/2 state to the spin-1/2 state. We find many interestingphenomena in the system.

作 者： LIANG Ya-Qiu WEI Guo-Zhu ZHANG Hong SONG Guo-Li   作者單位： LIANG Ya-Qiu(Department of Physics, Liaoning University, Shenyang 110036, China;College of Sciences, Northeastern University, Shenyang 110006, China)

WEI Guo-Zhu(College of Sciences, Northeastern University, Shenyang 110006, China;International Center for Material Physics, the Chinese Academy of Sciences, Shenyang 110016, China)

ZHANG Hong(Department of Physics, Liaoning University, Shenyang 110036, China)

SONG Guo-Li(Machinery Research Institute of Liaoning Province, Shenyang 110032, China) 

刊 名： 理論物理通訊(英文版)  ISTIC SCI 英文刊名： COMMUNICATIONS IN THEORETICAL PHYSICS  年，卷(期)： 2004 42(9)  分類號：   關(guān)鍵詞： Ising model   random field   crystal field   specific heat  

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